Isofenphos-methyl, 100 µg/ml, Acetonitrile, 1ml

EPA Method 502/524 Fortification Solution

2,4,5-Trichlorophenoxy-3,6-d2-acetic-d2 Acid, 100µg/mL, Solvent-isooctane, Unit 1mL, # of units-1, Cas.no. 358731-37-0

1,2,7,8-Tetrachloro[13C12]dibenzofuran, 1.2ml x 1ug/ml, nonane